02-01-15
SECTION 23 07 11
HVAC AND BOILER PLANT INSULATION
SPEC WRITER NOTE:
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References to pressures in this Section are gage pressure unless otherwise noted.
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PART 1 GENERAL
1.1 DESCRIPTION
A. Field applied insulation for thermal efficiency and condensation control for
1. HVAC piping, ductwork and equipment.
//2. Boiler plant mechanical systems including burner fuel oil storage and handling facilities but excluding outside steam distribution.//
//3. Re-insulation of HVAC piping, ductwork and equipment, plumbing piping and equipment and boiler plant piping, breeching and stacks and equipment after asbestos abatement.//
B. Definitions
1. ASJ: All service jacket, white finish facing or jacket.
2. Air conditioned space: Space having air temperature and/or humidity controlled by mechanical equipment.
3. Cold: Equipment, ductwork or piping handling media at design temperature of 16 degrees C (60 degrees F) or below.
4. Concealed: Ductwork and piping above ceilings and in chases, //interstitial space, // and pipe spaces.
5. Exposed: Piping, ductwork, and equipment exposed to view in finished areas including mechanical//, Boiler Plant// and electrical equipment rooms or exposed to outdoor weather. Attics and crawl spaces where air handling units are located are considered to be mechanical rooms. Shafts, chases, //interstitial spaces, // unfinished attics, crawl spaces and pipe basements are not considered finished areas.
6. FSK: Foilscrimkraft facing.
7. Hot: HVAC Ductwork handling air at design temperature above 16 degrees C (60 degrees F);HVAC equipment or piping handling media above 41 degrees C (105 degrees F)//; Boiler Plant breechings and stack temperature range 150-370 degrees C(300-700 degrees F) and piping media and equipment 32 to 230 degrees C(90 to 450 degrees F)//.
8. Density: kg/m3 - kilograms per cubic meter (Pcf - pounds per cubic foot).
9. Runouts: Branch pipe connections up to 25-mm (one-inch) nominal size to fan coil units or reheat coils for terminal units.
10. Thermal conductance: Heat flow rate through materials.
a. Flat surface: Watt per square meter (BTU per hour per square foot).
b. Pipe or Cylinder: Watt per square meter (BTU per hour per linear foot).
11. Thermal Conductivity (k): Watt per meter, per degree C (BTU per inch thickness, per hour, per square foot, per degree F temperature difference).
12. Vapor Retarder (Vapor Barrier): A material which retards the transmission (migration) of water vapor. Performance of the vapor retarder is rated in terms of permeance (perms). For the purpose of this specification, vapor retarders shall have a maximum published permeance of 0.1 perms and vapor barriers shall have a maximum published permeance of 0.001 perms.
13. HPS: High pressure steam (415 kPa [60 psig] and above).
14. HPR: High pressure steam condensate return.
15. MPS: Medium pressure steam (110 kPa [16 psig] thru 414 kPa [59 psig].
16. MPR: Medium pressure steam condensate return.
17. LPS: Low pressure steam (103 kPa [15 psig] and below).
18. LPR: Low pressure steam condensate gravity return.
19. PC: Pumped condensate.
20. HWH: Hot water heating supply.
21. HWHR: Hot water heating return.
22. GH: Hot glycol-water heating supply.
23. GHR: Hot glycol-water heating return.
24. FWPD: Feedwater pump discharge.
25. FWPS: Feedwater pump suction.
26. CTPD: Condensate transfer pump discharge.
27. CTPS: Condensate transfer pump suction.
28. VR: Vacuum condensate return.
29. CPD: Condensate pump discharge.
30. R: Pump recirculation.
31. FOS: Fuel oil supply.
32. FOR: Fuel oil return.
33. CW: Cold water.
34. SW: Soft water.
35. HW: Hot water.
36. CH: Chilled water supply.
37. CHR: Chilled water return.
38. GC: Chilled glycol-water supply.
39. GCR: Chilled glycol-water return.
40. RS: Refrigerant suction.
41. PVDC: Polyvinylidene chloride vapor retarder jacketing, white.
1.2 RELATED WORK
A. Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES.
//B. Section 02 82 11, TRADITIONAL ASBESTOS ABATEMENT.//
//C. Section 02 82 13.13, GLOVEBAG ASBESTOS ABATEMENT.//
D. Section 07 84 00, FIRESTOPPING.
E. Section 23 05 11, COMMON WORK RESULTS FOR HVAC.
//F. Section 23 05 10, COMMON WORK RESULTS FOR BOILER PLANT and STEAM GENERATION.//
G. Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.
H. Section 23 21 13, HYDRONIC PIPING.
I. Section 23 22 13, STEAM and CONDENSATE HEATING PIPING
J. Section 23 22 23, STEAM CONDENSATE PUMPS
K. Section 23 50 11, BOILER PLANT MECHANICAL EQUIPMENT
L. Section 23 51 00, BREECHINGS, CHIMNEYS, and STACKS
1.3 QUALITY ASSURANCE
A. Refer to article QUALITY ASSURANCE, in Section 23 05 11, COMMON WORK RESULTS FOR HVAC // and Section 23 05 10, COMMON WORK RESULTS FOR BOILER PLANT and STEAM GENERATION//.
B. Criteria:
1. Comply with NFPA 90A, particularly paragraphs 4.3.3.1 through 4.3.3.6, 4.3.10.2.6, and 5.4.6.4, parts of which are quoted as follows:
4.3.3.1 Pipe insulation and coverings, duct coverings, duct linings, vapor retarder facings, adhesives, fasteners, tapes, and supplementary materials added to air ducts, plenums, panels, and duct silencers used in duct systems, unless otherwise provided for in4.3.3.1.1 or4.3.3.1.2., shall have, in the form in which they are used, a maximum flame spread index of 25 without evidence of continued progressive combustion and a maximum smoke developed index of 50 when tested in accordance withNFPA 255, Standard Method of Test of Surface Burning Characteristics of Building Materials.
4.3.3.1.1 Where these products are to be applied with adhesives, they shall be tested with such adhesives applied, or the adhesives used shall have a maximum flame spread index of 25 and a maximum smoke developed index of 50 when in the final dry state. (See 4.2.4.2.)
4.3.3.1.2 The flame spread and smoke developed index requirements of4.3.3.1.1 shall not apply to air duct weatherproof coverings where they are located entirely outside of a building, do not penetrate a wall or roof, and do not create an exposure hazard.
4.3.3.2 Closure systems for use with rigid and flexible air ducts tested in accordance with UL 181, Standard for Safety Factory-Made Air Ducts and Air Connectors, shall have been tested, listed, and used in accordance with the conditions of their listings, in accordance with one of the following:
(1) UL 181A, Standard for Safety Closure Systems for Use with Rigid Air Ducts and Air Connectors
(2) UL 181B, Standard for Safety Closure Systems for Use with Flexible Air Ducts and Air Connectors
4.3.3.3 Air duct, panel, and plenum coverings and linings, and pipe insulation and coverings shall not flame, glow, smolder, or smoke when tested in accordance with a similar test for pipe covering, ASTM C 411, Standard Test Method for Hot-Surface Performance of High-Temperature Thermal Insulation, at the temperature to which they are exposed in service.
4.3.3.3.1 In no case shall the test temperature be below 121°C (250°F).
4.3.3.4 Air duct coverings shall not extend through walls or floors that are required to be fire stopped or required to have a fire resistance rating, unless such coverings meet the requirements of5.4.6.4.
4.3.3.5* Air duct linings shall be interrupted at fire dampers to prevent interference with the operation of devices.
4.3.3.6 Air duct coverings shall not be installed so as to conceal or prevent the use of any service opening.
4.3.10.2.6 Materials exposed to the airflow shall be noncombustible or limited combustible and have a maximum smoke developed index of 50 or comply with the following.
4.3.10.2.6.1 Electrical wires and cables and optical fiber cables shall be listed as noncombustible or limited combustible and have a maximum smoke developed index of 50 or shall be listed as having a maximum peak optical density of 0.5 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.5 m (5 ft) or less when tested in accordance withNFPA 262, Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air-Handling Spaces.
//4.3.10.2.6.2 Pneumatic tubing for control systems shall be listed as having a maximum peak optical density of 0.5 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.5 m (5 ft) or less when tested in accordance with UL 1820, Standard for Safety Fire Test of Pneumatic Tubing for Flame and Smoke Characteristics. //
4.3.10.2.6.4 Optical-fiber and communication raceways shall be listed as having a maximum peak optical density of 0.5 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.5 m (5 ft) or less when tested in accordance with UL 2024, Standard for Safety Optical-Fiber Cable Raceway.
4.3.10.2.6.6 Supplementary materials for air distribution systems shall be permitted when complying with the provisions of4.3.3.
5.4.6.4 Where air ducts pass through walls, floors, or partitions that are required to have a fire resistance rating and where fire dampers are not required, the opening in the construction around the air duct shall be as follows:
(1) Not exceeding a 25.4 mm (1 in.) average clearance on all sides
(2) Filled solid with an approved material capable of preventing the passage of flame and hot gases sufficient to ignite cotton waste when subjected to the time-temperature fire conditions required for fire barrier penetration as specified inNFPA 251, Standard Methods of Tests of Fire Endurance of Building Construction and Materials
2. Test methods: ASTM E84, UL 723, or NFPA 255.
3. Specified k factors are at 24 degrees C (75 degrees F) mean temperature unless stated otherwise. Where optional thermal insulation material is used, select thickness to provide thermal conductance no greater than that for the specified material. For pipe, use insulation manufacturer's published heat flow tables. For domestic hot water supply and return, run out insulation and condensation control insulation, no thickness adjustment need be made.
4. All materials shall be compatible and suitable for service temperature, and shall not contribute to corrosion or otherwise attack surface to which applied in either the wet or dry state.
C. Every package or standard container of insulation or accessories delivered to the job site for use must have a manufacturer's stamp or label giving the name of the manufacturer and description of the material.
1.4 SUBMITTALS
A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES.
B. Shop Drawings:
1. All information, clearly presented, shall be included to determine compliance with drawings and specifications and ASTM, federal and military specifications.
a. Insulation materials: Specify each type used and state surface burning characteristics.
b. Insulation facings and jackets: Each type used. Make it clear that white finish will be furnished for exposed ductwork, casings and equipment.
c. Insulation accessory materials: Each type used.
d. Manufacturer's installation and fitting fabrication instructions for flexible unicellular insulation.
e. Make reference to applicable specification paragraph numbers for coordination.
C. Samples:
1. Each type of insulation: Minimum size 100 mm (4 inches) square for board/block/ blanket; 150 mm (6 inches) long, full diameter for round types.
2. Each type of facing and jacket: Minimum size 100 mm (4 inches square).
3. Each accessory material: Minimum 120 ML (4 ounce) liquid container or 120 gram (4 ounce) dry weight for adhesives / cement / mastic.
1.5 STORAGE AND HANDLING OF MATERIAL
Store materials in clean and dry environment, pipe covering jackets shall be clean and unmarred. Place adhesives in original containers. Maintain ambient temperatures and conditions as required by printed instructions of manufacturers of adhesives, mastics and finishing cements.
1.6 APPLICABLE PUBLICATIONS
A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by basic designation only.
B. Federal Specifications (Fed. Spec.):
LP535E (2)- 99 Plastic Sheet (Sheeting): Plastic Strip; Poly (Vinyl Chloride) and Poly (Vinyl Chloride - Vinyl Acetate), Rigid.
C. Military Specifications (Mil. Spec.):
MILA3316C (2)-90 Adhesives, FireResistant, Thermal Insulation
MILA24179A (1)-87 Adhesive, Flexible UnicellularPlastic
Thermal Insulation
MILC19565C (1)-88 Coating Compounds, Thermal Insulation, Fire-and Water-Resistant, Vapor-Barrier
MILC20079H-87 Cloth, Glass; Tape, Textile Glass; and Thread, Glass and Wire-Reinforced Glass
D. American Society for Testing and Materials (ASTM):
A16799(2004) Standard Specification for Stainless and HeatResisting ChromiumNickel Steel Plate, Sheet, and Strip
B20907 Standard Specification for Aluminum and AluminumAlloy Sheet and Plate
C411-05 Standard test method for HotSurface Performance of HighTemperature Thermal Insulation
C44907 Standard Specification for Mineral Fiber HydraulicSetting Thermal Insulating and Finishing Cement
C53309 Standard Specification for Calcium Silicate Block and Pipe Thermal Insulation
C53408 Standard Specification for Preformed Flexible Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form
C547-07 Standard Specification for Mineral Fiber pipe Insulation
C55207 Standard Specification for Cellular Glass Thermal Insulation
C553-08 Standard Specification for Mineral Fiber Blanket Thermal Insulation for Commercial and Industrial Applications
C585-09 Standard Practice for Inner and Outer Diameters of Rigid Thermal Insulation for Nominal Sizes of Pipe and Tubing (NPS System) R (1998)
C612-10 Standard Specification for Mineral Fiber Block and Board Thermal Insulation
C1126-04 Standard Specification for Faced or Unfaced Rigid Cellular Phenolic Thermal Insulation
C1136-10 Standard Specification for Flexible, Low Permeance Vapor Retarders for Thermal Insulation
D166897a (2006) Standard Specification for Glass Fabrics (Woven and Treated) for Roofing and Waterproofing